Updated flight phase 1 loop and flight phase 1 to 2 transition  code
Updated flight phase 2 loop and flight phase 2 to 3 transition  code
Updated all flight phase and flight phase transition code

- fixed some bugs (previous altitude was declared as int, ...)
- renamed + added constants for stillness detection
Cleaned defs.h

- removed unused constants HAO_FALLING_TRIGGER
- renamed FLIGHT_PHASE_XXX_MAX_DURATION to
FLIGHT_PHASE_XXX_MAX_SECONDS_DURATION
- moved camera pwm pins to pins.h